The British Boxing Board of Control will not sanction the fight because neither man holds a British licence.
Speaking at the conference, where the two fighters were separated by a steel fence, Haye said: "He is the ideal opponent for me. I am so glad he has got a good chin because if he didn't have a good chin he would be blasted out in first round.
"I tried to knock him out in Munich and this is the opportunity to shut him up."
The 31-year-old Haye added: "This is definitely personal. We genuinely don't like each other. He has threatened to break my jaw, he has threatened to slap me.
"This fight is about eradicating boxing of an idiot. I will give him a nice, slow, concussive beating."
Chisora, who was surrounded by eight security guards, said: "I don't like him.
"Talk is cheap now. That was a lucky shot he hit me with in Munich. Your talk is cheap. You always talk but you don't deliver in the ring."
The two men, whose news-conference clash three months ago is still being investigated by Munich police, revealed they had seen each other in London recently, with Chisora accusing Haye of having "pulled a knife". Haye responded: "I was eating a steak. It was in a restaurant."
Chisora had his licence withdrawn after a number of controversial incidents before and after the Klitschko fight - but he has
appealed against the decision.
"That Chisora and David Haye should ultimately benefit from the shame in Munich is difficult to stomach for many but it's the nature of boxing that such controversy will build the fight into the biggest of the year in this country. The British Boxing Board of Control might have hoped other federations such as one in Luxembourg might have stood behind them in a show of solidarity but we've known for some time that the most powerful governing force in boxing is money and this fight will make a lot of it."
Chisora's manager Frank Warren had previously said he would not go ahead with a fight between the two boxers.
However, he said he had changed his mind because
against his licence withdrawal had been "pushed back to July".
Warren said: "What [Chisora] did was stupid and there should be some sort of punishment. But he will be out of action for six months and will lose money. Why should he not make a living?"
Chisora was granted a licence to fight by the Luxembourg Boxing Federation but Warren added that "a number of commissions" had been willing to do so.
Warren said he would not be taking a commission from Chisora for the fight, but would make money as a "shareholder" in the BoxNation subscription channel that will air the fight.
Dereck Chisora in bloody brawl with David Haye
When asked whether holding the event might threaten his own licence as a promoter with the British Boxing Board of Control (BBBoC), Warren said he hoped the organisation would not hold it against him.
"What I'm doing is legal and lawful," he said. "I have a managerial contract with Chisora, I have legal obligations to him and I won't have these compromised by the British Boxing Board of Control.
"When they made their decision, they said he was able to apply for a licence in another jurisdiction. That was said at the hearing, and that is what he's done."
Rival boxing promoter Frank Maloney told the BBC the fight "undermines the authority" of the BBBoC.
He said: "It's like the [English] FA. Would we see the Luxembourg FA coming over to the UK and starting their own league?
How can the fight happen?
European Union freedom of trade laws permit the fight to be held in the United Kingdom, while they have been given licences by the Luxembourg Boxing Federation.
"It is a way of dancing around the regulations," said BBC boxing commentator Mike Costello.
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